电力系统故障瞬间静止无功发生器的可控性分析

Controllable analysis of a static var generator at the moment of fault occurrence in a power system

以 2 0 Mvar静止无功发生器 (ASVG)工业装置的开发为背景 ,分析了电力系统发生故障的瞬间 ,连接于系统中ASVG所受的影响。通过对装置和系统中主要电压和电流矢量的描述 ,并借助数字仿真 ,研究了系统发生故障瞬间 ,ASVG由正常状态进入故障状态的原因。指出在系统中电压(特别是电压相位 )发生变化的情况下 ,可以通过控制以及同步信号的选取 ,使装置在一定程度上避免进入故障状态 。

Research and experience in the development of a 20Mvar advanced static var generator (ASVG) was used to analyze the effect of the system on the the ASVG at the moment of a sudden fault in the power system. Digital simulations and vector graphs of the voltages and currents in the system and in the ASVG were used to analyze the transition of the ASVG from normal operating conditions to the fault condition. When the system voltage, especially the phase of the voltage, changes suddenly, proper selection of the control strategy and synchronous signal can minimize or avoid the ASVG faults to some extend. Thus, the ASVG survive ability in the power system can be enhanced.